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arXiv · hep-ex/0112023

Study of the K- -> pi0 e- nu decay

I. Ajinenko·S. Akimenko·G. Akopdzhanov·K. Belous·I. Britvich·G. Britvich·A. Filin·V. Govorun·A. Inyakin·V. Konstantinov·A. Konstantinov·I. Korolkov·V. Khmelnikov·V. Leontiev·V. Novikov·V. Obraztsov·V. Polyakov·V. Romanovsky·V. Ronjin·V. Senko·N. Shalanda·M. Shapkin·V. Shelikhov·N. Smirnov·A. Sokolov·O. Tchikilev·E. Vlasov·O. Yushchenko·V. Bolotov·S. Laptev·A. Polyarush·V. Postoev·S. Yaschenko·B. Zalikhanov·V. Serdyuk
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Abstract

The decay K- -> pi0 e- nu has been studied using in-flight decays detected with "ISTRA+" setup operating at the 25 GeV negative secondary beam of the U-70 PS. About 130K events were used for the analysis. The lambda_+ parameter of the vector formfactor has been measured: lambda_+ = 0.0293 +- 0.0015(stat) +- 0.002(syst). The limits on the possible tensor and scalar couplings have been derived: f_T/f_+(0)=-0.044 +0.059 -0.057 (stat) f_S/f_+(0)=-0.020 +0.025 -0.016 (stat)

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I. Ajinenko, S. Akimenko, G. Akopdzhanov, K. Belous, I. Britvich, G. Britvich, A. Filin, V. Govorun, A. Inyakin, V. Konstantinov, A. Konstantinov, I. Korolkov, V. Khmelnikov, V. Leontiev, V. Novikov, V. Obraztsov, V. Polyakov, V. Romanovsky, V. Ronjin, V. Senko, N. Shalanda, M. Shapkin, V. Shelikhov, N. Smirnov, A. Sokolov, O. Tchikilev, E. Vlasov, O. Yushchenko, V. Bolotov, S. Laptev, A. Polyarush, V. Postoev, S. Yaschenko, B. Zalikhanov, V. Serdyuk. 2001-12-17. Study of the K- -> pi0 e- nu decay. https://doi.org/10.1134/1.1522096

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